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在国家点火设施展示了用于核聚变爆炸的新型放射化学混合诊断方法

S A MacLaren¹, E L Dewald¹, D A Martinez¹

¹Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.

Physical review letters

|September 10, 2025

概括

使用带电粒子放射化学的新诊断方法准确地测量了吸尘器材料与惯性封闭融合 (ICF) 燃料的混合. 这种技术有助于了解混合物降解,并改善用于点火的融合内爆性能.

科学领域:

核物理核物理核物理
等离子体物理学的物理学
材料科学材料科学材料科学

背景情况:

在惯性封闭聚变 (ICF) 爆破中混合灭器材料降低了性能,减少了压缩,增加了辐射损失,阻碍了点火.
精确测量消化器混合物对于理解和减轻这些有害影响至关重要.

研究的目的:

开发和演示一种新型的诊断技术,用于量化ICF爆发的聚变热点内的消化器材料混合物.
评估消化器混合物对融合性能的影响,并指导改善封闭的策略.

主要方法:

利用带电粒子放射化学测量了与核聚变燃料混合的消化器材料 (特别是) 的数量.
在囊设计中采用了分级的- (Be-Cr) 层,以增强热点的限制.
收集并计数爆炸过程中产生的特定同位素 (^52Mn和^51Cr),以确定Cr混合率.

主要成果:

成功开发了一种新型诊断工具,能够测量ICF脉冲中的消化器混合物.
^52Mn与^51Cr同位素的比率与混合到热点中的数量直接相关.
证明了使用放射化学在现场混合量化的可行性.

结论:

已经建立了一个新的带电粒子放射化学诊断方法,用于量化ICF中的消化器混合物.
这种诊断提供了评估混合诱导退化和优化ICF性能的关键工具.
这些发现为改进ICF囊设计和实现点火铺平了道路.

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